Improvement in endless-belt gearings



J. FARR.

ENDLESS-BELT GEARING.

Patented Feb. 8, 1876.

iiiZnesSes ",PETERS. PNOTWUTKQGRAPHLR, WASHINGTON. [JV 0.

JOSEPH FARR, OF NEW YORK, N. Y. ASSIGNOR TO LYDIA ANN- MOOOLLUM, SOLE EXEOUTRIX-AND TRUSTEE OF THE ESTATE OF JOHN MGOOLLUM,

DECEASED.

V lM PROVEMENT IN ENDLESS-BELT GEARINGS.

Specification forming part of Letters Patent No. 173,332, dated February 8, 1876; application filed A January 3, 1876.

To all whom it may concern:

Be it known that I, JOSEPH PARR, of the city, county, and State of New York, have invented a new and useful Improvement in Means for Driving Endless Aprons; and I do'hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing, which forms part of this specification.

My invention consists in novel means for obtaining a more positive motion in endless aprons than has heretofore been obtained, and the prevention of the slipping of the said aprons on the driving-roller. The invention is intended more especially to obviate the aforesaid difficulty in cracker-machines, in which the irregularity in driving the endless aprons, caused by the aforesaid slipping on the driving-roller, has hitherto rendered the cutting of the dough very irregular; but my improvement has applications in other machines.

Figure I is a plan view of a part of a cracker- Inachine, showing the top of an endless apron with my invention applied, a portion of the frame being broken away to show the means employed to tighten the endless apron. Fig. 2 is a vertical longitudinal section of the same.

Similar letters refer to like parts in both the engravings.

F is the frame which supports the endless apron A andthe mechanism which drives it. The endless apron is stretched upon the driving-roller It and the extension-roller R The shaft .5 of the driving-roller is mounted in fixed boxes or bearings, b, in the frame F.

The shaft s of the extension-roller is mounted in adjustable boxes [1 said boxes I) being fitted to play in'slots s in the upper side bars of the frame F. From the outer ends of the boxes b extend through the end walls of the slots 8 male screws m, having nuts 0% fitted thereon. The said nuts n abut against the said end walls of the slots s and, when turned, serve to slacken or tighten the endless apron A.

R is a pressure-roller, forced toward the driving-roller R by means of adjustable bearings b The bearings I) are formed in the ends of sliding rods 4, which play in sleeves s. The said sleeves s are bolted or otherwise fastened firmly to the fralneF. In the rear ends of the sleeves are fitted compressionscrews c, and between the inner ends of the said compression-screws and. the rear ends of the sliding rods r are placed compressionsprings of coiled wire, rubber, or other suitable material, the tension of which may be varied by turning the compression-screws c, by which means the pressure of the pressure-roller R toward the driving-roller r is regulated as desired.

The endless apron A is made to pass between the driving roller or pulley R and the pressure-roller R and it is griped between said rollers R and B so strongly that in the proper working of the machine it cannot slip, whether thesaid apron be extremely slack or extremely tight, different kinds of work sometimes requiring different amounts of tension in endless aprons.

Instead of springs a weighted lever or weighted levers may be employed to impart the required pressure to the roller R upon the endless apron interposed between the said roller R and the driving-roller R.

I claim- 1. In combination with the driving-roller R,

the pressure roller R sliding rod 7, sleeves s,

and inclosed spring, substantially as and for the purposes set forth. 2. In combination with the rollers R and R the sliding rod 1', and spring and sleeve, the adjustingscrew -c, substantially as described.

JOSEPH FARR. Witnesses:

MroHAnL RYAN, FRED. HAYNES. 

